condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.023064282333333335 0.0 0.04612856466666667 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0102843285 0.0 0.020568657 ZT20-23 0.010568635 0.0 0.02113727